This is a sip of agreement on the article, the story of three agreements : sip, sdp, sap the working principle of the agreement, worth studying

Packet : 24512goodarticle.rar filelist
SIP、SAP及SDP协议组合应用的研究.mht
SIP SAP及SDP协议组合应用的研究中国IT认证实验室---争分夺秒报道IT认证资讯！.mht
SIP、SAP及SDP协议组合应用的研究-2.mht

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